Dr. Mark Irwin Harris, MD
- Medicare services, 2024
- 375
- Medicare patients, 2024
- 270
- Part D claims, 2024
- 1,261
- Hospital affiliations
- 1
- Industry payments
- $3,938
- Practice address
- 1000 Johnson Ferry Road, NE, Atlanta, GA 30342
- Practice phone
- Call (404) 851-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Mark Irwin Harris is a neurologist in Atlanta, Georgia
Dr. Harris practices at Northside Hospital Atlanta in Atlanta, Georgia, part of Northside Hospital.
Dr. Harris' NPI, 1649262577, was assigned on August 17, 2005. Dr. Harris holds Georgia license 30084.
- NPI
- 1649262577NPI Registry (opens in a new tab)
- NPI enumeration date
- August 17, 2005
- NPI status
- Active
- Practice phone
- (404) 851-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark Irwin Harris practices at Northside Hospital Atlanta in Atlanta, Georgia
Dr. Harris' primary practice is Northside Hospital Atlanta, at 1000 Johnson Ferry Road, NE, Atlanta, GA 30342 in Fulton County. The practice phone is (404) 851-8000.
- Northside Hospital Atlanta1000 Johnson Ferry Road, NE, Atlanta, GA 30342 · Fulton CountyPhone(404) 851-8000
Source: Dmand AI Affiliation Data
Dr. Mark Irwin Harris is affiliated with 3 sites of care and 1 medical group
Dr. Harris' primary practice is Northside Hospital Atlanta in Atlanta, Georgia, part of Northside Hospital. The medical group on file is Northside Hospital Primary Care. Dmand AI also links Dr. Harris to 1 more physician office and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Irwin Harris' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Harris practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northside Hospital Atlanta | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Northside Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Irwin Harris is one of 537 neurologists in Georgia
Neurology is Dr. Harris' primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Harris is licensed in Georgia.
Specialties and state licenses
- Neurology, GeorgiaPrimary
Neurologists near Dr. Harris
Counts of neurologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Irwin Harris billed Medicare for 375 services in 2024
CMS data shows 375 Medicare services from Dr. Harris across 7 procedure codes in 2024, for 270 Medicare patients. Medicare paid $29,340 for them. Every service was in an office.
Dr. Harris' Medicare services by type, 2024
- Office and hospital visits255
- Tests and treatments120
Dr. Harris compared with the Georgia median for neurologists, 2024
- Dr. Harris
- Georgia median
- Medicare services
- 375vs 3565% above
- Medicare patients
- 270vs 20830% above
- Part D claims
- 1,086vs 3333.3 times
Medians across 505 neurologists in Georgia with Dmand AI profiles that report each measure.
Dr. Harris' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Irwin Harris treated 270 Medicare patients in 2024, average age 77
CMS counts 270 Medicare patients who saw Dr. Harris in 2024. The largest group is 75 to 84, with 136 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Harris' median patient age at 64, with 53% women.
Dr. Harris' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Harris' Medicare patients by sex, 2024
- Women14052%
- Men13048%
Chronic conditions among Dr. Harris' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis53%
- Ischemic heart disease37%
- Alzheimer's and dementia30%
- Diabetes30%
- Mood disorders30%
- Anxiety29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Harris' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women53%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Irwin Harris wrote 1,261 Medicare Part D claims in 2024
In 2024, Dr. Harris wrote 1,261 Medicare Part D claims for 330 patients. 89% of them were for generic drugs. CMS names the drug for 1,086 of them, across 31 drugs with 11 or more claims each, at $126,001 in total drug cost.
Dr. Harris' Part D claims by kind of drug, 2024
- Generic1,121 claims89%
- Brand-name140 claims11%
Dr. Harris' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Harris' Part D claims, 2024
- Antipsychotics, patients 65 and over3%44 of 1,261 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Mark Irwin Harris received $3,938 in industry payments in 2024
CMS Open Payments shows 68 general payments to Dr. Harris from 21 drug and device companies in 2024. Speaker and faculty fees make up the largest share, 62% of the total. Eli Lilly and Company paid the most, $2,488.
General payments to Dr. Harris by kind, 2024 to 2024
- Speaker and faculty fees$2,45062%
- Food and beverage$1,48838%
Companies that paid Dr. Harris the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark Irwin Harris's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark Irwin Harris
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark Irwin Harris' NPI number?
Dr. Mark Irwin Harris' NPI number is 1649262577. It was assigned on August 17, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Irwin Harris?
Dr. Mark Irwin Harris is a neurologist in Atlanta, Georgia. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Mark Irwin Harris practice?
Dr. Harris practices at 1000 Johnson Ferry Road, NE, Atlanta, GA 30342. Dr. Harris' primary practice is Northside Hospital Atlanta in Atlanta, Georgia, part of Northside Hospital. Dmand AI also links Dr. Harris to 1 physician office and 1 group practice or clinic.
What is Dr. Mark Irwin Harris' office phone number?
The practice phone on file for Dr. Harris is (404) 851-8000.
What is Dr. Mark Irwin Harris' medical license number?
Dr. Harris holds Georgia license 30084.
Which hospitals is Dr. Mark Irwin Harris affiliated with?
Dr. Harris practices at Northside Hospital Atlanta in Atlanta, Georgia.
What medical group is Dr. Mark Irwin Harris part of?
Dr. Harris is linked to Northside Hospital Primary Care.
Does Dr. Mark Irwin Harris accept Medicare?
Yes. CMS data shows Dr. Harris billed Medicare for 375 services in 2024.
How many Medicare patients does Dr. Mark Irwin Harris see?
CMS counts 270 Medicare patients who saw Dr. Harris in 2024, with an average age of 77.
What services does Dr. Mark Irwin Harris bill to Medicare?
In 2024, Dr. Harris' most billed Medicare services were office visit, established patient (99214), health assessment (96138) and office visit, established patient (99215).
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What drugs does Dr. Mark Irwin Harris prescribe most?
In 2024 Medicare Part D data, Dr. Harris' most prescribed drugs by claims were Donepezil HCl, Carbidopa-Levodopa and Gabapentin.
Has Dr. Mark Irwin Harris received payments from drug or device companies?
CMS Open Payments shows $3,938 in general payments to Dr. Harris from 21 companies from 2024 to 2024. The largest total came from Eli Lilly and Company.
How long has Dr. Mark Irwin Harris been practicing?
Dr. Harris graduated from medical school in 1982, 44 years ago.
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